class HomeWork_5_1{
	public static void main(String[] args){
		System.out.println("hello world!");
	}
}
class HomeWork_5_2{
	public static void main (String[] args){
		System.out.println("hello world!");
	}
}
class HomeWork_5_4{
	public static void main(String[] args){
		System.out.println("hello world!");
	}
}
class HomeWork_5_5{
	public static void main(String[] args){
		System.out.println("hello world!");
	}
}
class HomeWork_5_6{
	public static void main(String[] args){
		System.out.println("hello world!");
	}
}
class HomeWork_5_7{
	public static void main(String[] args){
		System.out.println("hello world");
	}
}
class HomeWork_5_8{
	public static void main(String[] args){
		System.out.println("hello world!");
	}
}
class HomeWork_5_9{
	public static void main(String[] args){
		System.out.println("hello world!");
	}
}
class HomeWork_5_10{
	public static void main(String[] args){
		System.out.println("hello world!");
	}
}